Correct

当空

/ dāngkōng / 
Strokes

Definition

overhead/up in the sky

Example

As a Verb

be in the sky

1
Lièrìdāngkōng
烈日当空
  
。

The sun is blazing right overhead.

2
Hàoyuè
皓月
dāngkōng
当空
  
。

A bright moon is shining brightly in the sky.